SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8b101dd9f45e1bb60ef0331b63e8cf81f547502723c805fc543ae35f14050587' 
  AND token = 'UiKHp7iDJIGPVIo9xEFatUOW8/MTyWYWq+HalqFGmgk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}